No protection against breast cancer from green tea: Green tea is by no means harmful and has proven to be a valuable health prophylaxis in many areas.
(10/29/2010) Green tea offers no protection against breast cancer. In a Japanese long-term study, the scientists found that despite the multiple proven anti-cancer properties of green tea, even with a daily consumption of more than ten cups, the green tea does not reduce the risk of disease. The scientists at the National Cancer Center in Tokyo had observed almost 54,000 women over a period of five years and recorded tea consumption and breast cancer.
No reduction in breast cancer risk "Drinking green tea, regardless of the type of tea and the amount consumed, is unlikely to reduce the risk of breast cancer," said Motoki Iwasaki of the National Cancer Center in Tokyo when the results were recently published in the online journal "Breast Cancer Research ". For example, the results of previous studies, which had found that various ingredients of green tea had an anti-cancer effect in animal experiments and in cell cultures, could not be confirmed in the study of 53,793 Japanese women. Based on the data from the Japan Public Health Center study from 1990 to 1994 and the subsequent follow-up examinations, Motoki Iwasaki and colleagues evaluated the old study results with their own five-year study, which also queried the tea consumption of the two varieties, Sencha and Bancha / Genmaicha , connected. They came to the conclusion that since the time of the baseline study, 581 women have developed breast cancer, on average 13.6 years after the first examination.
Breast cancer risk independent of tea consumption The tea consumption of women was very different and varied over a wide range. While around twelve percent of the respondents drank less than one cup of green tea a week, 27 percent said they had at least five cups a day. However, this did not result in a different risk of breast cancer. Even women who drank more than ten cups of green tea a day were at the same risk of developing breast cancer, the Japanese scientists said in their current publication. The fact that relatively few women develop breast cancer in Asian countries compared to western industrialized nations cannot therefore be attributed to tea consumption. For example, green tea contains a lot of catechins, which on the one hand act as antioxidants and on the other hand have anti-cancer and other health-promoting properties. When drinking green tea, however, no effect on the risk of breast cancer is detectable, write the researchers around Motoki Iwasaki.
Green tea promotes health Even though there is no evidence of an effect on breast cancer risk, this should not prevent women from drinking green tea regularly. In the so-called Ohsaki study with 40,530 adults between the ages of 40 and 79, which ran for 11 years, positive cardiovascular properties and a corresponding life-prolonging effect of green tea were clearly demonstrated. The death rate for male test participants who drank at least five cups of green tea a day fell by 12 percent, and in women by 23 percent. In particular, the deaths caused by cardiovascular diseases decreased considerably - in women by nine percent (31 percent versus 22 percent). In addition, the polyphenols and fluorides contained in green tea reduced the risk of dental caries.
Green tea also has a prophylactic effect against diabetic nephropathy, a kidney disease caused by diabetes mellitus, with the experts assuming that the polyphenols contained in green tea trap free radicals and thus reduce the accumulation of glucose on the body's own proteins, effectively protecting the kidney be. In addition, the Egyptian scientist Dr. Mervat Kassem found that green tea significantly increases the effectiveness of antibiotics and even some originally resistant germs responded to antibiotics again when the green tea was taken. Last but not least, green tea is also said to have a preventive effect in Alzheimer's and Parkinson's, since the antioxidant epigallocatechin gallate prevents the formation of amyloid fibrils, which are responsible for neurodegenerative diseases such as Alzheimer's and Parkinson's. (10/29/2010)
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